Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A Jenga-style cylindrical tower of books that appears to go on forever.

In the fictional world of Kcymaerxthaere, standing at this site just outside Vienna, Austria, the sky would have been found beneath your feet.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

A history of heat is on display at this unique Austrian museum.

An exquisite Baroque church in Vienna's old town.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

This cubist Vienna church building looks like some sort of alien stonehenge.

The final resting place for the remains of 143 Habsburg royalty.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.